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  #21  
Old 01-24-2019, 05:33 PM
bobg56 bobg56 is offline
 
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I believe that the shorter coax is between the GDL-82 and transponder antenna, similar to the diagram showing the Cessna layout.
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  #22  
Old 02-12-2019, 03:06 PM
Bud K's Avatar
Bud K Bud K is offline
 
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Location: Shell Knob, MO
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Default GDL 82 install into an RV-7

Bob, interesting topic. I too am installing a GDL 82 but into my RV-7. I went with the antenna shelf under my engine cowling for both the GNC 250XL and the GDL 82 GPS antennas. I have one final question. Which USB pigtail wire color did you plug into the J821 pin #6? I have found (with a google search) that sometimes the USB green wire is D+ and sometimes its D-.
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  #23  
Old 02-13-2019, 01:32 PM
bobg56 bobg56 is offline
 
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This is what I did regarding USB pin#1 is white..#6 green...#7 Ground...#11 Red...I'm installing it in the next few days...
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  #24  
Old 02-13-2019, 01:34 PM
bobg56 bobg56 is offline
 
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also it is on page 10-2...figure 10-1 sheet 1
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  #25  
Old 02-18-2019, 09:13 AM
Flyingleap Flyingleap is offline
 
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Location: Cincinnati,Ohio KHAO
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Default Coax to L-Band Transponder

Bob, I did call Garmin regarding the length of the 400 coax cable from the GDL82 and the required L-Band transponder antenna. They said "as short as possible". I told them I was putting the GDL82 in the avionics bay 6 to 8 feet away. Two tech's at Garmin said "OK". Both tech's gave a long pause before they would say "OK" Hmmm... John
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  #26  
Old 02-18-2019, 03:44 PM
bobg56 bobg56 is offline
 
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Location: Peachtree City, GA
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I've heard a few guys say they put it there, and put the GPS antenna next to the Nav GPS antenna under the engine cowl and it worked fine. I have not started my installation yet. I thought of putting the unit in the tunnel area close to my xponder antenna but I'll have to open it up to see if it will have clearance there.
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  #27  
Old 02-20-2019, 10:53 PM
Driftdown Driftdown is offline
 
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Location: Clearwater, Florida
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Quote:
Originally Posted by bobg56 View Post
. . . I have not started my installation yet. I thought of putting the unit in the tunnel area close to my xponder antenna but I'll have to open it up to see if it will have clearance there.
Same here.
The closer to the L-band antenna . . the better.
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